Verona Rupes is a huge cliff face located on Uranus's moon Miranda. It's the tallest cliff in the solar system, as much as twenty kilometers deep. If you jumped off it, you'd fall for twelve minutes...and you could still survive. »4/04/11 2:00pm 4/04/11 2:00pm

The great challenge for any climber is to conquer each continent's tallest mountain. But tomorrow's climbers can consider a far more extreme challenge: leaving Earth to climb the tallest peaks of the solar system. Here's how they'll do it. »10/01/10 9:30am 10/01/10 9:30am

One of the worst examples of unrealistic science in movies is the overly simple alien planet. Oftentimes, our heroes will visit the desert planet, or the Irish planet. But the best extraterrestrial worlds in science fiction are the ones with variety and a realistic ecosystem. They have cities as well as countryside,… »6/11/08 1:55pm 6/11/08 1:55pm

Discovered by the Serenity crew, Miranda is perfectly habitable, once you scrape away all the dead people. But in my opinion that's just a thousand less people I have to stand behind in line to get groceries. The cool thing about Miranda is that it showcases the Alliance's much-vaunted terraforming methods that we're… »6/11/08 1:26pm 6/11/08 1:26pm

A little while back, io9er Ed said Titan was "The Awesomest Moon in the Solar System." Well where I come from, them's fightin' words. What about Earth's Moon? Mars' Phobos? Europa?? There are boatloads of kickass moons in the solar system. We break down ten contenders in a highly scientific chart to settle this… »5/02/08 1:50pm 5/02/08 1:50pm